Here is a video of the XTIDE settings that seem to be best for the Sega TeraDrive. Please note I have used a slightly less than current version 2.0.0b1 instead of 2.0.0b2. As long as it works I do not feel the urge to upgrade just yet… Maybe once it is not a beta I will. The EEPROM BIOS dump for the TeraDrive can be found on the File Server.

A terminology trap worth clearing up: the modern XTIDE project used here is not the same thing as the historical XTA, or XT Attachment, disk interface. XTIDE provides an 8-bit ISA route to ATA devices, while XTA was an older and incompatible storage interface that happened to acquire the nickname “XT-IDE” in some historical documentation.

Later project documentation warns that 2.0.0 beta 1 can use different logical CHS parameters from beta 2 and subsequent releases. Upgrading an existing installation can risk data corruption; the documentation calls for recreating and formatting the affected partitions after upgrading.

Sources